91 
Nedentil afsluttes Naebbet med et Par noget mere 
complicerede Munddele (Fig. 18), der forestiller de egent- 
Kjaevet0dder. Do or ligesom de ovenfor omtalte Muiul- 
dele rottede lige fortil og daekker disse mere eller mindre 
bddstamdigt nedentil (se Pig. 14). Man kan paa dem ad- 
skille en j 4 utydelige Segmenter afdelt Stamme eller Ba- 
saidel, der fortil gaar ml i en dolkformig, i den indre Kant 
hnt tan det Fortsats (Tyggelap), og en til den vdre Side af 
dcime sidste f sestet enleddet og med korte Bovster besat 
udedel eller Palpe, der kun lidet overrager hin Fortsats. 
Bag Naebbet er til Hovedsegmentets Underside taestet 
( St Dig. 14) et Par Lemmer. der aabenbart svarer til de 
°pei kelfonnige accessoriske Kjsevefpdder hos Hannen, men 
som her er udviklede paa en belt a.nden Maade, nemlig til 
1 Fastklamrin'gsredskaber. 
-A.1 Form er de (Fig. 19) cylindriske og noget Sformigt 
boiede samt bestaar at' 6 Led, hvoraf de bagerste paa den 
indre Side riser et Antal af skarpe chitinpsa Tvserfoldei. 
Sidste Led er omformet til en overordentlig kraftig hage- 
feiinigt htfiet Klo. livis ydre Del or af ssordolos last Cod si- 
stens og sylforinigt tilspidset. 
Be egentlige Fodder (Fig. 20) stemmer i sin Bygning 
inldkoinmen overens med samme Iios Hannen, dog med den 
oiskjel. at de gauske mangier de knudelormige r I fender, 
formed de ydre Led hos bin er bevsebnede, ligesom ogsaa 
°i stebesmtningen er langt sparsommere. 
Bagkroppens Buglemmer (Fig. 21) er uddannede til 
'il udviklede Svommeredskaber, idet de 2 ovale Endeplader 
Spidsen er forsynede med lange cilierede Svpmmeborstei. 
Haleviften (Fig. 22) er vistnok i Hovedsagen af samme 
Ogning som hos Hannen, men riser dog nogle mindre Hi 1- 
feieutser. Den midterste Haleplade er saaledes noget mindre 
nidknebet i sit ydre Parti, og paa den stum pi tilrundede 
pids bemairkes et lidet mediant Indsnit. fra livis Bund 2 
v °ite Borster rager frem. De ydre Halevedhamgs Ende- 
plader er forboldsvis noget bredere end samme hos Hannen 
c ^ e Paa dem fsestede Borster stserkere udviklede. 
Bar ven er ensformig livid og noget 
11 111 ‘''P°r af nogen Pigmentering. 
Lsengden af de storste Larver er 10®"", 
ei ’boldte 5.80 mm . 
gjennemsigtig, 
af de mindste 
Forekomst og Udbredning. Naervaerende eiendonnne- 
forekommer, som det synes, ikke saa ganske sjeldent 
P aa de store Dyb i den kolde Area. Vi bar Exemplarer 
ikke mindre end 7 forskjellige Stationer, Dybden fra 
>n8 til 1215 Favne. De allerfleste indsamlede Exemplarer 
Var bildt udviklede Hanner; derimod fandtes ingen fuld- 
V0Xen Hun og kun nogle faa Larver. Disse sidste lever 
rjitieligvis parasitisk paa Dybvandsfiske eller andre storre 
Dybvandsdyr. 
Below, the beak is bounded by a pair of somewhat 
more complicated oral appendages (fig. 18), representing the 
true maxillipeds. They have, like the oral appendages 
spoken of above, a straight, anterior direction, covering the 
latter, more or less completely, below (see fig. 14). On the 
appendages ma.y be distinguished a stem, or basal part, 
divided into 4 indistinct segments, that, anteriorly, jut out 
as a dagger-shaped, on the inner margin finely dentate, 
projection (masticatory lobe), and. attached to the outer 
side of this projection, a one-jointed terminal portion, or 
palp, beset with short bristles, reaching but slightly beyond 
the said projection. 
Posterior to the beak, are attached on the under sur- 
face of the cephalic segment (see fig. 14) a pair of appen- 
dages. evidently corresponding to the operculiform accessory 
maxillipeds in the male, but here, however, developed for a 
widely different purpose, viz. to serve as powerful prehensile 
organs. 
They are cylindric and somewhat S-shaped in form, 
and consist of 6 joints, of which the hindermost on the 
inner side exhibits a number of sharp-edged, chitinous. trans- 
verse folds. The last joint is transformed into a remarkably 
powerful, hook-shaped claw, the outer portion of which is 
exceedingly firm in consistence, and produced to an awl- 
shaped point. 
The true legs (fig. 20) agree completely in struc- 
ture with those of the male, saving however the total ab- 
sence of tuberculiform teeth, with which the outer joints 
in the latter are armed, as also a much less abundant sup- 
ply of bristles. 
The pleopoda (fig. 21) are developed as fully efficient 
natatory organs, the 2 ovate terminal plates being furnished 
at the point with long, ciliated natatory bristles. 
The caudal fan (fig. 22) is indeed essentially of the 
same structure as that in the male, but exhibits however 
a few minor points of difference. The median caudal plate 
is for example, somewhat less constricted in its outer por- 
tion, and at the obtusely rounded point, occurs a small 
median incision, from the bottom of which project 2 short 
bristles. The terminal plates of the outer caudal appen- 
dages are comparatively somewhat broader than those in 
the male, and the bristles attached to them more fully 
developed. 
Colour a uniform white and semi-translucent, without 
a trace of pigment. 
Length of the largest specimens of larvae collected 
10”"". of the smallest o.8() mm . 
Occurrence and Distribution. — The present pecu- 
liar species occurs, it would seem, notsoveiy laiely, tlnougli- 
out the great depths of the cold area. We obtained ex- 
amples at not less than 7 different Stations, in depths 
ranging from 658 to 1215 fathoms. Most of the specimens 
collected were fully developed males, no full-grown female 
having been taken and but very -few larvae. The latter 
probably exist as parasites on deep-sea fishes or other large 
deep-sea animals. 
\ 
l 
12* 
